// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_FORMATS_MP2T_TS_SECTION_PSI_H_
#define MEDIA_FORMATS_MP2T_TS_SECTION_PSI_H_

#include <stdint.h>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "media/base/byte_queue.h"
#include "media/formats/mp2t/ts_section.h"

namespace media {

class BitReader;

namespace mp2t {

    class TsSectionPsi : public TsSection {
    public:
        TsSectionPsi();
        ~TsSectionPsi() override;

        // TsSection implementation.
        bool Parse(bool payload_unit_start_indicator,
            const uint8_t* buf,
            int size) override;
        void Flush() override;
        void Reset() override;

        // Parse the content of the PSI section.
        virtual bool ParsePsiSection(BitReader* bit_reader) = 0;

        // Reset the state of the PSI section.
        virtual void ResetPsiSection() = 0;

    private:
        void ResetPsiState();

        // Bytes of the current PSI.
        ByteQueue psi_byte_queue_;

        // Do not start parsing before getting a unit start indicator.
        bool wait_for_pusi_;

        // Number of leading bytes to discard (pointer field).
        int leading_bytes_to_discard_;

        DISALLOW_COPY_AND_ASSIGN(TsSectionPsi);
    };

} // namespace mp2t
} // namespace media

#endif // MEDIA_FORMATS_MP2T_TS_SECTION_PSI_H_
